Basically, by doing things that increase your standing in the search results, especially increasing number of links to the page you want ranked higher, although it isn't a simple relationship.
See these articles and resources:
http://www.google.com/webmasters/
http://www.webworkshop.net/pagerank.html
http://www.iprcom.com/papers/pagerank/
http://pr.efactory.de/
http://www.searchengineguide.com/orb...0207_orb1.html